I am referring to my main power wire coming in from the battery to my junction. I am about to get a new pov with taxes and would like to shut it all down when the truck cuts off, that way when get back to the station from a call my battery isn't dead. I will be running 8 to 10 gauge fused to a junction powering 3 radios, my lights and sirens. I figure 25 amps is more than enough. I just want to kill all the power at once instead of 5 different relays. could someone point me in the direction of a single relay that will hold that kind of power. Also remember guys not everyone is stupid cause they have a question. I know what a relay is, and how to hook one up, I am just inexperienced in relays over 10 to 15 amps. Thanks again.